CN115536232A - Carbon source recovery method based on sludge pyrohydrolysis - Google Patents
Carbon source recovery method based on sludge pyrohydrolysis Download PDFInfo
- Publication number
- CN115536232A CN115536232A CN202211281294.0A CN202211281294A CN115536232A CN 115536232 A CN115536232 A CN 115536232A CN 202211281294 A CN202211281294 A CN 202211281294A CN 115536232 A CN115536232 A CN 115536232A
- Authority
- CN
- China
- Prior art keywords
- sludge
- filtrate
- treatment
- carbon source
- carrying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of sludge treatment and discloses a carbon source recovery method based on sludge pyrohydrolysis. The method comprises the following steps: carrying out sand removal, slag removal and centrifugal dehydration on primary sludge and excess sludge generated in the sewage treatment process to obtain pre-dehydrated sludge and dehydrated filtrate; carrying out thermal hydrolysis treatment, dilution heat exchange and centrifugal dehydration on the pre-dehydrated sludge to obtain dehydrated sludge and high-concentration organic filtrate; carrying out an acidification process on the high-concentration organic filtrate by depending on the proliferation of microorganisms existing in the high-concentration organic filtrate, and then returning the high-concentration organic filtrate to a sewage treatment plant as a denitrification carbon source after denitrification dephosphorization treatment; and (3) performing high-solid anaerobic digestion on the dewatered sludge to obtain biogas, and converting the biogas into electric energy and/or heat energy. The invention realizes the harmlessness, stabilization, reduction and resource of sludge treatment on one hand, and can further realize resource utilization by effectively utilizing the carbon source in the filtrate on the other hand.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and particularly relates to a carbon source recovery method based on sludge pyrohydrolysis.
Background
In recent years, town sewage treatment is rapidly developed, and town water environment treatment has remarkable effect. However, the large amount of sludge produced in the urban sewage treatment process has not been generally disposed of effectively. The sludge is very easy to cause secondary pollution to underground water, soil and the like, becomes a threat to environmental safety and public health, and influences the positive effects of energy conservation and emission reduction implementation, so that effective treatment and disposal of the sludge are a difficult problem to be solved urgently at present.
For sludge with poor properties, low organic matter, large sand content and large property fluctuation, the existing sludge treatment theory and technology cannot really solve the current special dilemma, and the sludge treatment technology suitable for the sludge with poor properties starts late, the maturity is still verified, and through the development of recent years, the development and popularization of unit technology are mainly considered although hundreds of flowers are full. However, the treatment and disposal of the sludge is a complex system integrated by a multi-unit technology, the number of engineering projects really achieving the full chain is very small, and the sludge is subjected to further long-term verification and system evaluation. Based on the above, a method for recovering a carbon source based on sludge pyrohydrolysis is urgently needed to be proposed.
Disclosure of Invention
The invention aims to provide a carbon source recovery method based on sludge pyrohydrolysis aiming at the defects of the prior art, and the method realizes the harmlessness, stabilization, reduction and resource of sludge treatment on one hand, and can effectively utilize the carbon source in the filtrate to further realize resource utilization on the other hand.
In order to achieve the aim, the invention provides a method for recovering a carbon source based on sludge pyrohydrolysis, which comprises the following steps:
s1: carrying out sand and slag removal treatment on primary sludge and excess sludge generated in the sewage treatment process;
s2: performing centrifugal dehydration on the sludge subjected to sand and slag removal treatment to obtain pre-dehydrated sludge and dehydrated filtrate;
s3: carrying out thermal hydrolysis treatment on the pre-dewatered sludge to obtain thermal hydrolysis sludge;
s4: sequentially diluting, heat exchanging and centrifugally dewatering the thermal hydrolysis sludge to obtain dewatered sludge and high-concentration organic filtrate;
s5: carrying out an acidification process on the high-concentration organic filtrate by depending on the proliferation of microorganism groups existing in the high-concentration organic filtrate, and then carrying out nitrogen and phosphorus removal treatment to obtain a denitrification carbon source which is returned to a sewage treatment plant;
s6: and (3) carrying out high-solid anaerobic digestion on the dewatered sludge to obtain biogas, and converting the biogas into electric energy and/or heat energy.
According to the present invention, preferably, in step S1,
carrying out desanding and deslagging treatment on primary sludge and residual sludge generated in the sewage treatment process by adopting a cyclone desander;
for sand grains with the grain diameter of more than 50 mu m, the effect of the sand and slag removing treatment reaches 94-96 percent.
According to the present invention, preferably, in step S2,
the dehydration filtrate is sent back to a sewage treatment plant for treatment;
the dehydration medicament for centrifugal dehydration is cationic polyacrylamide;
the equipment for centrifugal dehydration is a horizontal screw centrifuge, the rotating speed is 2000-4000rpm, and the rotating speed difference is 0-30rpm;
the water content of the pre-dewatered sludge is 80-85%.
According to the present invention, preferably, in step S3,
the thermal hydrolysis treatment adopts a Cambi thermal hydrolysis process;
the operating conditions of the thermal hydrolysis treatment include: the reaction pressure is 0.6-1.0MPa, the reaction temperature is 160-180 ℃, and the reaction duration is 30-60min.
According to the present invention, preferably, in step S4,
the equipment for performing dilution heat exchange is a plate heat exchanger, the water content of the sludge after dilution heat exchange is 88-92%, and the temperature is 37-55 ℃;
the centrifugal dehydration of the sludge after the dilution and heat exchange does not need to add a dehydration medicament (because the thermal hydrolysis temperature exceeds 160 ℃, the centrifugal dehydration of the sludge does not need to add the dehydration medicament); the equipment for centrifugal dehydration is a horizontal screw centrifuge, the rotating speed is 2000-4000rpm, and the rotating speed difference is 0-30rpm;
the water content of the sludge after centrifugal dehydration is 80-85%.
According to the present invention, preferably, in step S5,
the hydraulic retention time in the acidification process is controlled below 3 days, the acidification fermentation temperature is 35-60 ℃, and the equipment for carrying out the acidification process is a fully mixed reactor; in the invention, the fermentation temperature can be selected from medium temperature (40 ℃) or high temperature (55 ℃);
and the denitrification and dephosphorization treatment comprises the steps of sequentially carrying out filtrate ammonia nitrogen stripping, filtrate ammonia absorption and filtrate phosphorus recovery treatment on the filtrate subjected to the acidification process.
According to the invention, preferably, ammonia gas obtained by blowing off ammonia nitrogen in the filtrate is subjected to ammonia gas absorption treatment in the filtrate to obtain a nitrogen source, and the filtrate subjected to ammonia nitrogen blowing off treatment in the filtrate is subjected to phosphorus recovery treatment in the filtrate to obtain a phosphorus source and a carbon source.
According to the present invention, it is preferable that,
the pH value of the filtrate ammonia nitrogen stripping treatment is 10-11;
the absorption liquid used in the filtrate ammonia absorption treatment is phosphoric acid and/or sulfuric acid solution;
and the filtrate phosphorus recovery treatment comprises the step of recovering phosphorus in the filtrate after the filtrate ammonia nitrogen stripping treatment by adopting a struvite precipitation method.
According to the invention, the struvite precipitation process preferably has a molar ratio of Mg: N: P of (1-1.2): 1: (1-1.2).
According to the present invention, preferably, in step S6,
converting the biogas into heat energy for preparing saturated steam, wherein the saturated steam is used in the thermal hydrolysis treatment; the saturated steam is produced by a biogas boiler.
Controlling the organic load of the dewatered sludge for high-solid anaerobic digestion to be 2.7-4.5gVS/L/d.
The technical scheme of the invention has the following beneficial effects:
the sludge is subjected to thermal hydrolysis, centrifugal dehydration and filtrate acidification to serve as a denitrification carbon source, and the sludge cake high-solid anaerobic digestion can fully utilize the carbon source in the sludge, so that the harmlessness, stabilization, reduction and recycling of sludge treatment are realized at lower cost.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 is a schematic flow chart of a carbon source recovery method based on sludge pyrohydrolysis in example 1 of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
The embodiment provides a carbon source recovery method based on sludge pyrohydrolysis, and as shown in fig. 1, the method comprises the following steps:
s1: the primary sludge and the residual sludge generated in the sewage treatment process are subjected to sand and slag removal treatment by adopting a cyclone desander, and the separation effect of sand grains with the grain size of more than 50 mu m is 94-96 percent.
S2: performing centrifugal dehydration on the sludge subjected to sand and slag removal treatment to obtain pre-dehydrated sludge with the water content of 80% and dehydrated filtrate; the dehydration filtrate is sent back to a sewage treatment plant for treatment;
the dehydration medicament for centrifugal dehydration is cationic polyacrylamide with 5 per mill (dry basis); the equipment for centrifugal dehydration is a horizontal screw centrifuge, the rotating speed is 2000-4000rpm, and the rotating speed difference is 0-30rpm;
s3: carrying out thermal hydrolysis treatment on the pre-dehydrated sludge by adopting a Cambi thermal hydrolysis process to obtain thermal hydrolysis sludge;
the operating conditions of the thermal hydrolysis treatment include: the reaction pressure is 0.6-1.0MPa, the reaction temperature is 160-180 ℃, and the reaction duration is 30-60min.
S4: sequentially diluting, exchanging heat and centrifugally dewatering the thermal hydrolysis sludge to obtain dewatered sludge with the water content of 80-85% and high-concentration organic filtrate;
the equipment for performing dilution heat exchange is a plate heat exchanger, the water content of the sludge after dilution heat exchange is 88-92%, and the temperature is 37-55 ℃;
centrifugal dehydration is carried out without adding a dehydration medicament; the equipment for centrifugal dehydration is a horizontal screw centrifuge, the rotating speed is 2000-4000rpm, and the rotating speed difference is 0-30rpm;
s5: carrying out an acidification process on the high-concentration organic filtrate by depending on the proliferation of microorganism groups existing in the high-concentration organic filtrate, and then carrying out nitrogen and phosphorus removal treatment to obtain a denitrification carbon source which is returned to a sewage treatment plant;
the hydraulic retention time in the acidification process is controlled below 3 days, the acidification fermentation temperature is medium temperature (40 ℃), and the equipment for carrying out the acidification process is a fully mixed reactor;
and the denitrification and dephosphorization treatment comprises the steps of sequentially carrying out filtrate ammonia nitrogen stripping, filtrate ammonia absorption and filtrate phosphorus recovery treatment on the filtrate subjected to the acidification process. And (3) subjecting ammonia gas obtained by blowing off the ammonia nitrogen in the filtrate to absorption treatment of the filtrate ammonia gas to obtain a nitrogen source, and subjecting the filtrate subjected to the ammonia nitrogen blowing off treatment to phosphorus recovery treatment of the filtrate to obtain a phosphorus source and a carbon source.
The pH value of the ammonia nitrogen stripping treatment of the filtrate is 10-11;
the absorption liquid used in the ammonia absorption treatment of the filtrate is phosphoric acid solution;
the filtrate phosphorus recovery treatment comprises the step of recovering phosphorus in the filtrate after the filtrate ammonia nitrogen stripping treatment by adopting a struvite precipitation method, wherein the molar ratio of Mg to N to P is 1.2:1:1.2;
s6: and (2) performing high solid content anaerobic digestion on the dewatered sludge, controlling the organic load to be 2.7-4.5gVS/L/d, wherein the high solid content anaerobic digestion adopts a fully mixed reactor, the reactor adopts intermittent stirring to obtain biogas, one part of biogas is used for generating steam required by pyrohydrolysis in the embodiment, and the rest biogas is used for generating power.
While embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A carbon source recovery method based on sludge pyrohydrolysis is characterized by comprising the following steps:
s1: carrying out sand and slag removal treatment on primary sludge and excess sludge generated in the sewage treatment process;
s2: performing centrifugal dehydration on the sludge subjected to sand and slag removal treatment to obtain pre-dehydrated sludge and dehydrated filtrate;
s3: carrying out thermal hydrolysis treatment on the pre-dewatered sludge to obtain thermal hydrolysis sludge;
s4: sequentially diluting, heat exchanging and centrifugally dewatering the thermal hydrolysis sludge to obtain dewatered sludge and high-concentration organic filtrate;
s5: carrying out an acidification process on the high-concentration organic filtrate by depending on the proliferation of microorganism groups existing in the high-concentration organic filtrate, and then carrying out nitrogen and phosphorus removal treatment to obtain a denitrification carbon source which is returned to a sewage treatment plant;
s6: and carrying out high-solid anaerobic digestion on the dewatered sludge to obtain biogas, and converting the biogas into electric energy and/or heat energy.
2. The method for recovering a carbon source based on sludge pyrohydrolysis according to claim 1, wherein, in step S1,
carrying out desanding and deslagging treatment on primary sludge and residual sludge generated in the sewage treatment process by adopting a cyclone desander;
the effect of sand and slag removal treatment reaches 94-96%.
3. The method for recovering a carbon source based on sludge pyrohydrolysis according to claim 1, wherein, in step S2,
the dehydrated filtrate is sent back to a sewage treatment plant for treatment;
the dehydration medicament for centrifugal dehydration is cationic polyacrylamide;
the equipment for centrifugal dehydration is a horizontal screw centrifuge, the rotating speed is 2000-4000rpm, and the rotating speed difference is 0-30rpm;
the water content of the pre-dewatered sludge is 80-85%.
4. The method for recovering a carbon source based on sludge pyrohydrolysis according to claim 1, wherein, in step S3,
the thermal hydrolysis treatment adopts a Cambi thermal hydrolysis process;
the operating conditions of the thermal hydrolysis treatment include: the reaction pressure is 0.6-1.0MPa, the reaction temperature is 160-180 ℃, and the reaction duration is 30-60min.
5. The method for recovering a carbon source based on sludge pyrohydrolysis according to claim 1, wherein, in step S4,
the equipment for performing dilution heat exchange is a plate heat exchanger, the water content of the sludge after dilution heat exchange is 88-92%, and the temperature is 37-55 ℃;
the centrifugal dehydration of the sludge after dilution and heat exchange is not added with a dehydration medicament; the equipment for centrifugal dehydration is a horizontal screw centrifuge, the rotating speed is 2000-4000rpm, and the rotating speed difference is 0-30rpm;
the water content of the sludge after centrifugal dehydration is 80-85%.
6. The method for recovering a carbon source based on sludge pyrohydrolysis according to claim 1, wherein, in step S5,
the hydraulic retention time in the acidification process is controlled below 3 days, the acidification fermentation temperature is 35-60 ℃, and the equipment for carrying out the acidification process is a fully mixed reactor;
and the denitrification and dephosphorization treatment comprises the steps of sequentially carrying out filtrate ammonia nitrogen stripping, filtrate ammonia absorption and filtrate phosphorus recovery treatment on the filtrate subjected to the acidification process.
7. The method for recycling the carbon source based on the thermal hydrolysis of the sludge as claimed in claim 6, wherein the ammonia gas obtained by blowing off the ammonia nitrogen from the filtrate is subjected to ammonia gas absorption treatment to obtain a nitrogen source, and the filtrate obtained by blowing off the ammonia nitrogen from the filtrate is subjected to phosphorus recycling treatment to obtain the phosphorus source and the carbon source.
8. The method for recovering a carbon source based on sludge pyrohydrolysis according to claim 7,
the pH value of the filtrate ammonia nitrogen stripping treatment is 10-11;
the absorption liquid used in the ammonia absorption treatment of the filtrate is phosphoric acid and/or sulfuric acid solution;
and the filtrate phosphorus recovery treatment comprises the step of recovering phosphorus in the filtrate after the filtrate ammonia nitrogen stripping treatment by adopting a struvite precipitation method.
9. The method for recovering a carbon source based on thermal hydrolysis of sludge according to claim 8, wherein the struvite precipitation method has a molar ratio of Mg to N to P of (1-1.2): 1: (1-1.2).
10. The method for recovering a carbon source based on sludge pyrohydrolysis according to claim 1, wherein, in step S6,
converting the biogas into heat energy for preparing saturated steam, wherein the saturated steam is used in the thermal hydrolysis treatment;
controlling the organic load of the dewatered sludge for high-solid anaerobic digestion to be 2.7-4.5gVS/L/d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211281294.0A CN115536232A (en) | 2022-10-19 | 2022-10-19 | Carbon source recovery method based on sludge pyrohydrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211281294.0A CN115536232A (en) | 2022-10-19 | 2022-10-19 | Carbon source recovery method based on sludge pyrohydrolysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115536232A true CN115536232A (en) | 2022-12-30 |
Family
ID=84735394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211281294.0A Pending CN115536232A (en) | 2022-10-19 | 2022-10-19 | Carbon source recovery method based on sludge pyrohydrolysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115536232A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859038A (en) * | 2016-05-17 | 2016-08-17 | 同济大学 | Sewage treatment process for efficiently utilizing carbon source in sludge |
| CN106746467A (en) * | 2017-01-25 | 2017-05-31 | 同济大学 | A kind of sludge resource recovery method based on digested sludge hydro-thermal process |
| CN108423957A (en) * | 2018-02-07 | 2018-08-21 | 同济大学 | A method of realizing sludge sub-prime split-phase resource reclaim |
| CN111362561A (en) * | 2020-03-25 | 2020-07-03 | 北京城市排水集团有限责任公司 | Method for resource utilization of sludge |
| CN111646661A (en) * | 2020-05-25 | 2020-09-11 | 北京城市排水集团有限责任公司 | Energy recovery and fertilizer preparation process based on sludge pyrohydrolysis split-phase digestion |
| US20210024396A1 (en) * | 2017-12-18 | 2021-01-28 | Veolia Water Solutions & Technologies Support | Method of treating sludge |
| CN113336404A (en) * | 2021-04-29 | 2021-09-03 | 北京城市排水集团有限责任公司 | Resource method for developing thermal hydrolysis sludge carbon source |
-
2022
- 2022-10-19 CN CN202211281294.0A patent/CN115536232A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859038A (en) * | 2016-05-17 | 2016-08-17 | 同济大学 | Sewage treatment process for efficiently utilizing carbon source in sludge |
| CN106746467A (en) * | 2017-01-25 | 2017-05-31 | 同济大学 | A kind of sludge resource recovery method based on digested sludge hydro-thermal process |
| US20210024396A1 (en) * | 2017-12-18 | 2021-01-28 | Veolia Water Solutions & Technologies Support | Method of treating sludge |
| CN108423957A (en) * | 2018-02-07 | 2018-08-21 | 同济大学 | A method of realizing sludge sub-prime split-phase resource reclaim |
| CN111362561A (en) * | 2020-03-25 | 2020-07-03 | 北京城市排水集团有限责任公司 | Method for resource utilization of sludge |
| CN111646661A (en) * | 2020-05-25 | 2020-09-11 | 北京城市排水集团有限责任公司 | Energy recovery and fertilizer preparation process based on sludge pyrohydrolysis split-phase digestion |
| CN113336404A (en) * | 2021-04-29 | 2021-09-03 | 北京城市排水集团有限责任公司 | Resource method for developing thermal hydrolysis sludge carbon source |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108558162B (en) | Method for recycling residual sludge hydrothermal carbonization liquid | |
| US7153427B2 (en) | Nitrogen recovery system and method using heated air as stripping gas | |
| CN101823806B (en) | Piggery waste water treatment method based on strong-thin shunt | |
| JP4024045B2 (en) | Sewage treatment method | |
| CN104909530A (en) | Anaerobic digestion sludge conditioning system and method | |
| CN109250884B (en) | Biogas slurry efficient deamination process combining digested sludge with thermal hydrolysis | |
| CN101524699A (en) | Method for improving anaerobic digestion performance of sludge by utilizing microwave alkaline thermal hydrolysis | |
| CN104803546A (en) | Technology for reducing and recycling treatment of sludge of sewage treatment plant | |
| CN110937772A (en) | Method for separating organic/inorganic components from sludge | |
| CN102361828A (en) | Method for producing non-putrescible sludge and energy and corresponding plant | |
| CN105254150A (en) | Pretreatment method for increasing yield of excess sludge anaerobic digestion methane | |
| CN114262137B (en) | Coupling embedded type thermal hydrolysis sludge and kitchen collaborative digestion process | |
| CN113292216A (en) | Method for treating excess sludge by combined process of thermokalysis, ammonium magnesium phosphate fixation of phosphorus and nitrogen and dehydration utilization | |
| CN102531303A (en) | Method for improving dry process fermenting property of municipal sludge by sludge modification | |
| US7718064B2 (en) | Integrated clean biomass to energy system | |
| CN113336404A (en) | Resource method for developing thermal hydrolysis sludge carbon source | |
| CN109879325B (en) | Method for recovering phosphorus and metal from sludge-based hydrothermal carbon | |
| Rulkens et al. | Recovery of energy from sludge–comparison of the various options | |
| CN111484219A (en) | System and method for treating sludge through two-phase anaerobic digestion | |
| CN115536232A (en) | Carbon source recovery method based on sludge pyrohydrolysis | |
| Li et al. | Nitrogen removal of thermal hydrolysis-anaerobic digestion liquid: A review | |
| CN112624537B (en) | Method and system for reducing biochemical excess sludge | |
| CN113754219A (en) | Process for improving yield of excess sludge anaerobic digestion methane by papermaking white mud pretreatment | |
| CN111186969B (en) | Method and system for decrement treatment of biochemical excess sludge | |
| CN212864497U (en) | Sludge reduction, harmless and recycling treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |